Hard, harder, hardest: principal stratification, statistical identifiability, and the inherent difficulty of finding surrogate endpoints
Crossref DOI link: https://doi.org/10.1186/1742-7622-11-14
Published Online: 2014-08-26
Published Print: 2014-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Wolfson, Julian
Henn, Lisa
Article History
Received: 19 May 2014
Accepted: 14 August 2014
First Online: 26 August 2014